Home / 113.50-128

Finding the Third Proportional to 113.50 and 128

Calculator

Solution

The third proportional to 113.50 and 128 is: 144.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.50 : 128 = 128 : x
  2. Step 2: Convert to fraction form
    113.50/128 = 128/x
  3. Step 3: Cross multiply
    113.50x = 128 × 128
  4. Step 4: Simplify right side
    113.50x = 16,384
  5. Step 5: Solve for x
    x = 16,384/113.50
  6. Step 6: Final answer
    x = 144.35

Related Problems

Find third proportional to 56.75 and 64
Half scale
Find third proportional to 227 and 256
Double scale
Find third proportional to 116 and 130
Similar ratio
Find third proportional to 170.25 and 192
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.